The Art of French Pastry

fully cook it out. Failing to
do so will cause the
onions to release liquid
during the baking,
resulting in a loose
custard and a soggy crust.
Alsatian Riesling, one of
the great wines of France,
is much drier than
German or California
Riesling. If you cannot get
hold of it you can use
another dry white wine.